57705-23-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57705-23-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,7,0 and 5 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 57705-23:
(7*5)+(6*7)+(5*7)+(4*0)+(3*5)+(2*2)+(1*3)=134
134 % 10 = 4
So 57705-23-4 is a valid CAS Registry Number.